package com.heima.admin.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdChannelMapper;
import com.heima.admin.service.AdChannelService;
import com.heima.common.exception.CustomException;
import com.heima.model.admin.dtos.ChannelDTO;
import com.heima.model.admin.pojos.AdChannel;
import com.heima.model.common.dtos.PageResponseResult;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import net.bytebuddy.implementation.bytecode.Throw;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.Date;


@Service
public class AdminChannelServiceImpl extends ServiceImpl<AdChannelMapper, AdChannel> implements AdChannelService {

    /**
     *  按照条件分页查询频道列表,按照顺序编号升序排序
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findByNameAndPage(ChannelDTO dto) {
        //1.校验参数
        dto.checkParam();
        //分页条件
        Page<AdChannel> channelPage = new Page<>(dto.getPage(), dto.getSize());

        //2.条件组装
        LambdaQueryWrapper<AdChannel> query = Wrappers.<AdChannel>lambdaQuery();

        if (StringUtils.isNotBlank(dto.getName())) {
            query.like(AdChannel::getName,dto.getName());
        }

        if (dto.getStatus()!=null) {
            query.eq(AdChannel::getStatus,dto.getStatus());
        }

        query.orderByAsc(AdChannel::getOrd);

        IPage<AdChannel> resultPage = this.page(channelPage, query);

        //3.封装返回结果

        return new PageResponseResult(dto.getPage(), dto.getSize(),resultPage.getTotal(),resultPage.getRecords());

    }

    /**
     *    新增频道功能
     *    频道名称不能为空, 不能大于10个字符
     *    且频道名称不可以重复
     * @param adChannel
     * @return
     */
    @Override
    public ResponseResult insert(AdChannel adChannel) {
        //1.校验参数
        if (StringUtils.isBlank(adChannel.getName())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }

        //2.判断频道合法性
        int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                .eq(AdChannel::getName, adChannel.getName()));
        if(count > 0){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
        }

        if (adChannel.getName().length()>10) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"频道名称不能超过10字符");
        }
        // 3 执行新增
        adChannel.setCreatedTime(new Date());
        this.save(adChannel);
        // 4 返回结果
        return ResponseResult.okResult();


    }


    @Override
    public ResponseResult update(AdChannel adChannel) {
        //1 参数校验
        if (adChannel.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2 执行修改
        AdChannel channel = this.getById(adChannel.getId());

        if (channel == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"频道信息不存在");
        }


        //3. 校验名称唯一性
        if(StringUtils.isNotBlank(adChannel.getName())
                &&
                !adChannel.getName().equals(channel.getName())){
            int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                    .eq(AdChannel::getName, adChannel.getName()));
            if(count > 0){
                return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
            }

            //3.1 校验长度
            if (adChannel.getName().length()>10){
                return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"频道名称不能超过10字符");
            }
        }
        this.updateById(adChannel);
        //4 返回结果
        return ResponseResult.okResult();
    }

    @Override
    public ResponseResult deleteById(Integer id) {
        //1.检查参数
        if(id == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2.判断当前频道是否存在 和 是否有效
        AdChannel adChannel = getById(id);
        if(adChannel==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 启用状态下不能删除
        if (adChannel.getStatus()) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        //3.删除频道
        removeById(id);
        if(true){
            throw new CustomException(AppHttpCodeEnum.DATA_NOT_EXIST,"捕获到自定义异常");
        }
        //System.out.println(1/0);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);

    }


}
